<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>startsWith方法和endsWith方法</title>
</head>
<body>
<script type="text/javascript">
    let str = 'Hello ECMAScript 2015';
    let r1 = str.startsWith('Hello');
    console.log(r1);
    let r2 = str.endsWith('2016');
    console.log(r2)
</script>
</body>
</html>
